Title:
【発明の名称】安全確保装置
Document Type and Number:
Japanese Patent JP3188894
Kind Code:
B2
Abstract:
A device for securing the safety of a worker, wherein a mechanically movable section is surrounded by a safety fence, a door lock means unlocked when a built-in solenoid is supplied with electric current from the outside and excited is provided to a door formed in the safety fence, and a door switch is unlocked when the mechanically movable section is stopped. Further, a movable section monitoring sensor is provided for monitoring whether the mechanically movable section is stopped or not, and, when the mechanically movable section is stopped, the movable section monitoring sensor produces an output signal of a logical value (1) corresponding to a high energetic state without performing NOT operation and energizes the solenoid of the lock door means in response to this output signal. With this arrangement, only when the mechanically movable section is stopped, the door lock means is unlocked. Furthermore, in case when the sensor is in trouble, the solenoid is not energized, whereby the door lock means is not unlocked, so that the safety of the worker can be reliably secured.
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Inventors:
Akira Sugimoto
Masatoshi Suzuki
Kouichi Yomugihara
Masayoshi Sakai
Ritsuo Sampei
Masatoshi Suzuki
Kouichi Yomugihara
Masayoshi Sakai
Ritsuo Sampei
Application Number:
JP50155295A
Publication Date:
July 16, 2001
Filing Date:
June 04, 1993
Export Citation:
Assignee:
Nippon Signal Co., Ltd.
International Classes:
F16P3/08; H01H27/00; (IPC1-7): F16P3/08
Domestic Patent References:
| JPS57115664U | 1982-07-17 | |||
| JPH05111628A | 1993-05-07 | |||
| JPS57177555U | 1982-11-10 | |||
| JPH05123937A | 1993-05-21 | |||
| JPS5167577A | 1976-06-11 | |||
| JPH04327098A | 1992-11-16 | |||
| JPH0564801A | 1993-03-19 | |||
| JPH0428936U | 1992-03-09 |
Foreign References:
| US4105903A | 1978-08-08 |
Attorney, Agent or Firm:
Fujio Sasashima